[thirdparty/git.git] / fsmonitor.c

#include "cache.h"
#include "config.h"
#include "dir.h"
#include "ewah/ewok.h"
#include "fsmonitor.h"
#include "run-command.h"
#include "strbuf.h"

#define INDEX_EXTENSION_VERSION1	(1)
#define INDEX_EXTENSION_VERSION2	(2)
#define HOOK_INTERFACE_VERSION		(1)

struct trace_key trace_fsmonitor = TRACE_KEY_INIT(FSMONITOR);

static void fsmonitor_ewah_callback(size_t pos, void *is)
{
	struct index_state *istate = (struct index_state *)is;
	struct cache_entry *ce;

	if (pos >= istate->cache_nr)
		BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" >= %u)",
		    (uintmax_t)pos, istate->cache_nr);

	ce = istate->cache[pos];
	ce->ce_flags &= ~CE_FSMONITOR_VALID;
}

int read_fsmonitor_extension(struct index_state *istate, const void *data,
	unsigned long sz)
{
	const char *index = data;
	uint32_t hdr_version;
	uint32_t ewah_size;
	struct ewah_bitmap *fsmonitor_dirty;
	int ret;
	uint64_t timestamp;
	struct strbuf last_update = STRBUF_INIT;

	if (sz < sizeof(uint32_t) + 1 + sizeof(uint32_t))
		return error("corrupt fsmonitor extension (too short)");

	hdr_version = get_be32(index);
	index += sizeof(uint32_t);
	if (hdr_version == INDEX_EXTENSION_VERSION1) {
		timestamp = get_be64(index);
		strbuf_addf(&last_update, "%"PRIu64"", timestamp);
		index += sizeof(uint64_t);
	} else if (hdr_version == INDEX_EXTENSION_VERSION2) {
		strbuf_addstr(&last_update, index);
		index += last_update.len + 1;
	} else {
		return error("bad fsmonitor version %d", hdr_version);
	}

	istate->fsmonitor_last_update = strbuf_detach(&last_update, NULL);

	ewah_size = get_be32(index);
	index += sizeof(uint32_t);

	fsmonitor_dirty = ewah_new();
	ret = ewah_read_mmap(fsmonitor_dirty, index, ewah_size);
	if (ret != ewah_size) {
		ewah_free(fsmonitor_dirty);
		return error("failed to parse ewah bitmap reading fsmonitor index extension");
	}
	istate->fsmonitor_dirty = fsmonitor_dirty;

	if (!istate->split_index &&
	    istate->fsmonitor_dirty->bit_size > istate->cache_nr)
		BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
		    (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);

	trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
	return 0;
}

void fill_fsmonitor_bitmap(struct index_state *istate)
{
	unsigned int i, skipped = 0;
	istate->fsmonitor_dirty = ewah_new();
	for (i = 0; i < istate->cache_nr; i++) {
		if (istate->cache[i]->ce_flags & CE_REMOVE)
			skipped++;
		else if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
			ewah_set(istate->fsmonitor_dirty, i - skipped);
	}
}

void write_fsmonitor_extension(struct strbuf *sb, struct index_state *istate)
{
	uint32_t hdr_version;
	uint32_t ewah_start;
	uint32_t ewah_size = 0;
	int fixup = 0;

	if (!istate->split_index &&
	    istate->fsmonitor_dirty->bit_size > istate->cache_nr)
		BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
		    (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);

	put_be32(&hdr_version, INDEX_EXTENSION_VERSION2);
	strbuf_add(sb, &hdr_version, sizeof(uint32_t));

	strbuf_addstr(sb, istate->fsmonitor_last_update);
	strbuf_addch(sb, 0); /* Want to keep a NUL */

	fixup = sb->len;
	strbuf_add(sb, &ewah_size, sizeof(uint32_t)); /* we'll fix this up later */

	ewah_start = sb->len;
	ewah_serialize_strbuf(istate->fsmonitor_dirty, sb);
	ewah_free(istate->fsmonitor_dirty);
	istate->fsmonitor_dirty = NULL;

	/* fix up size field */
	put_be32(&ewah_size, sb->len - ewah_start);
	memcpy(sb->buf + fixup, &ewah_size, sizeof(uint32_t));

	trace_printf_key(&trace_fsmonitor, "write fsmonitor extension successful");
}

/*
 * Call the query-fsmonitor hook passing the last update token of the saved results.
 */
static int query_fsmonitor(int version, const char *last_update, struct strbuf *query_result)
{
	struct child_process cp = CHILD_PROCESS_INIT;

	if (!core_fsmonitor)
		return -1;

	argv_array_push(&cp.args, core_fsmonitor);
	argv_array_pushf(&cp.args, "%d", version);
	argv_array_pushf(&cp.args, "%s", last_update);
	cp.use_shell = 1;
	cp.dir = get_git_work_tree();

	return capture_command(&cp, query_result, 1024);
}

static void fsmonitor_refresh_callback(struct index_state *istate, const char *name)
{
	int pos = index_name_pos(istate, name, strlen(name));

	if (pos >= 0) {
		struct cache_entry *ce = istate->cache[pos];
		ce->ce_flags &= ~CE_FSMONITOR_VALID;
	}

	/*
	 * Mark the untracked cache dirty even if it wasn't found in the index
	 * as it could be a new untracked file.
	 */
	trace_printf_key(&trace_fsmonitor, "fsmonitor_refresh_callback '%s'", name);
	untracked_cache_invalidate_path(istate, name, 0);
}

void refresh_fsmonitor(struct index_state *istate)
{
	struct strbuf query_result = STRBUF_INIT;
	int query_success = 0;
	size_t bol; /* beginning of line */
	uint64_t last_update;
	struct strbuf last_update_token = STRBUF_INIT;
	char *buf;
	unsigned int i;

	if (!core_fsmonitor || istate->fsmonitor_has_run_once)
		return;
	istate->fsmonitor_has_run_once = 1;

	trace_printf_key(&trace_fsmonitor, "refresh fsmonitor");
	/*
	 * This could be racy so save the date/time now and query_fsmonitor
	 * should be inclusive to ensure we don't miss potential changes.
	 */
	last_update = getnanotime();
	strbuf_addf(&last_update_token, "%"PRIu64"", last_update);

	/*
	 * If we have a last update time, call query_fsmonitor for the set of
	 * changes since that time, else assume everything is possibly dirty
	 * and check it all.
	 */
	if (istate->fsmonitor_last_update) {
		query_success = !query_fsmonitor(HOOK_INTERFACE_VERSION,
			istate->fsmonitor_last_update, &query_result);
		trace_performance_since(last_update, "fsmonitor process '%s'", core_fsmonitor);
		trace_printf_key(&trace_fsmonitor, "fsmonitor process '%s' returned %s",
			core_fsmonitor, query_success ? "success" : "failure");
	}

	/* a fsmonitor process can return '/' to indicate all entries are invalid */
	if (query_success && query_result.buf[0] != '/') {
		/* Mark all entries returned by the monitor as dirty */
		buf = query_result.buf;
		bol = 0;
		for (i = 0; i < query_result.len; i++) {
			if (buf[i] != '\0')
				continue;
			fsmonitor_refresh_callback(istate, buf + bol);
			bol = i + 1;
		}
		if (bol < query_result.len)
			fsmonitor_refresh_callback(istate, buf + bol);

		/* Now mark the untracked cache for fsmonitor usage */
		if (istate->untracked)
			istate->untracked->use_fsmonitor = 1;
	} else {

		/* We only want to run the post index changed hook if we've actually changed entries, so keep track
		 * if we actually changed entries or not */
		int is_cache_changed = 0;
		/* Mark all entries invalid */
		for (i = 0; i < istate->cache_nr; i++) {
			if (istate->cache[i]->ce_flags & CE_FSMONITOR_VALID) {
				is_cache_changed = 1;
				istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
			}
		}

		/* If we're going to check every file, ensure we save the results */
		if (is_cache_changed)
			istate->cache_changed |= FSMONITOR_CHANGED;

		if (istate->untracked)
			istate->untracked->use_fsmonitor = 0;
	}
	strbuf_release(&query_result);

	/* Now that we've updated istate, save the last_update_token */
	FREE_AND_NULL(istate->fsmonitor_last_update);
	istate->fsmonitor_last_update = strbuf_detach(&last_update_token, NULL);
}

void add_fsmonitor(struct index_state *istate)
{
	unsigned int i;
	struct strbuf last_update = STRBUF_INIT;

	if (!istate->fsmonitor_last_update) {
		trace_printf_key(&trace_fsmonitor, "add fsmonitor");
		istate->cache_changed |= FSMONITOR_CHANGED;
		strbuf_addf(&last_update, "%"PRIu64"", getnanotime());
		istate->fsmonitor_last_update = strbuf_detach(&last_update, NULL);

		/* reset the fsmonitor state */
		for (i = 0; i < istate->cache_nr; i++)
			istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;

		/* reset the untracked cache */
		if (istate->untracked) {
			add_untracked_cache(istate);
			istate->untracked->use_fsmonitor = 1;
		}

		/* Update the fsmonitor state */
		refresh_fsmonitor(istate);
	}
}

void remove_fsmonitor(struct index_state *istate)
{
	if (istate->fsmonitor_last_update) {
		trace_printf_key(&trace_fsmonitor, "remove fsmonitor");
		istate->cache_changed |= FSMONITOR_CHANGED;
		FREE_AND_NULL(istate->fsmonitor_last_update);
	}
}

void tweak_fsmonitor(struct index_state *istate)
{
	unsigned int i;
	int fsmonitor_enabled = git_config_get_fsmonitor();

	if (istate->fsmonitor_dirty) {
		if (fsmonitor_enabled) {
			/* Mark all entries valid */
			for (i = 0; i < istate->cache_nr; i++) {
				istate->cache[i]->ce_flags |= CE_FSMONITOR_VALID;
			}

			/* Mark all previously saved entries as dirty */
			if (istate->fsmonitor_dirty->bit_size > istate->cache_nr)
				BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
				    (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
			ewah_each_bit(istate->fsmonitor_dirty, fsmonitor_ewah_callback, istate);

			refresh_fsmonitor(istate);
		}

		ewah_free(istate->fsmonitor_dirty);
		istate->fsmonitor_dirty = NULL;
	}

	switch (fsmonitor_enabled) {
	case -1: /* keep: do nothing */
		break;
	case 0: /* false */
		remove_fsmonitor(istate);
		break;
	case 1: /* true */
		add_fsmonitor(istate);
		break;
	default: /* unknown value: do nothing */
		break;
	}
}
Commit	Line	Data
883e248b BP	1	#include "cache.h"
	2	#include "config.h"
	3	#include "dir.h"
	4	#include "ewah/ewok.h"
	5	#include "fsmonitor.h"
	6	#include "run-command.h"
	7	#include "strbuf.h"
	8
56c69100 KW	9	#define INDEX_EXTENSION_VERSION1 (1)
	10	#define INDEX_EXTENSION_VERSION2 (2)
	11	#define HOOK_INTERFACE_VERSION (1)
883e248b BP	12
	13	struct trace_key trace_fsmonitor = TRACE_KEY_INIT(FSMONITOR);
	14
	15	static void fsmonitor_ewah_callback(size_t pos, void *is)
	16	{
	17	struct index_state istate = (struct index_state )is;
3444ec2e	18	struct cache_entry *ce;
883e248b	19
3444ec2e WB	20	if (pos >= istate->cache_nr)
	21	BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" >= %u)",
	22	(uintmax_t)pos, istate->cache_nr);
	23
	24	ce = istate->cache[pos];
883e248b BP	25	ce->ce_flags &= ~CE_FSMONITOR_VALID;
	26	}
	27
	28	int read_fsmonitor_extension(struct index_state istate, const void data,
	29	unsigned long sz)
	30	{
	31	const char *index = data;
	32	uint32_t hdr_version;
	33	uint32_t ewah_size;
	34	struct ewah_bitmap *fsmonitor_dirty;
883e248b	35	int ret;
56c69100 KW	36	uint64_t timestamp;
56c69100 KW	37	struct strbuf last_update = STRBUF_INIT;
883e248b	38
56c69100	39	if (sz < sizeof(uint32_t) + 1 + sizeof(uint32_t))
883e248b BP	40	return error("corrupt fsmonitor extension (too short)");
	41
	42	hdr_version = get_be32(index);
	43	index += sizeof(uint32_t);
56c69100 KW	44	if (hdr_version == INDEX_EXTENSION_VERSION1) {
	45	timestamp = get_be64(index);
	46	strbuf_addf(&last_update, "%"PRIu64"", timestamp);
	47	index += sizeof(uint64_t);
	48	} else if (hdr_version == INDEX_EXTENSION_VERSION2) {
	49	strbuf_addstr(&last_update, index);
	50	index += last_update.len + 1;
	51	} else {
883e248b	52	return error("bad fsmonitor version %d", hdr_version);
56c69100	53	}
883e248b	54
56c69100	55	istate->fsmonitor_last_update = strbuf_detach(&last_update, NULL);
883e248b BP	56
	57	ewah_size = get_be32(index);
	58	index += sizeof(uint32_t);
	59
	60	fsmonitor_dirty = ewah_new();
	61	ret = ewah_read_mmap(fsmonitor_dirty, index, ewah_size);
	62	if (ret != ewah_size) {
	63	ewah_free(fsmonitor_dirty);
	64	return error("failed to parse ewah bitmap reading fsmonitor index extension");
	65	}
ba1b9cac	66	istate->fsmonitor_dirty = fsmonitor_dirty;
883e248b	67
61eea521 JH	68	if (!istate->split_index &&
61eea521 JH	69	istate->fsmonitor_dirty->bit_size > istate->cache_nr)
3444ec2e WB	70	BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
	71	(uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
	72
883e248b BP	73	trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
	74	return 0;
	75	}
	76
3bd28eb2 AV	77	void fill_fsmonitor_bitmap(struct index_state *istate)
3bd28eb2 AV	78	{
3444ec2e	79	unsigned int i, skipped = 0;
3bd28eb2	80	istate->fsmonitor_dirty = ewah_new();
3444ec2e WB	81	for (i = 0; i < istate->cache_nr; i++) {
	82	if (istate->cache[i]->ce_flags & CE_REMOVE)
	83	skipped++;
	84	else if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
	85	ewah_set(istate->fsmonitor_dirty, i - skipped);
	86	}
3bd28eb2 AV	87	}
3bd28eb2 AV	88
883e248b BP	89	void write_fsmonitor_extension(struct strbuf sb, struct index_state istate)
	90	{
	91	uint32_t hdr_version;
883e248b BP	92	uint32_t ewah_start;
	93	uint32_t ewah_size = 0;
	94	int fixup = 0;
	95
61eea521 JH	96	if (!istate->split_index &&
61eea521 JH	97	istate->fsmonitor_dirty->bit_size > istate->cache_nr)
3444ec2e WB	98	BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
	99	(uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
	100
56c69100	101	put_be32(&hdr_version, INDEX_EXTENSION_VERSION2);
883e248b BP	102	strbuf_add(sb, &hdr_version, sizeof(uint32_t));
883e248b BP	103
56c69100 KW	104	strbuf_addstr(sb, istate->fsmonitor_last_update);
	105	strbuf_addch(sb, 0); /* Want to keep a NUL */
	106
883e248b BP	107	fixup = sb->len;
	108	strbuf_add(sb, &ewah_size, sizeof(uint32_t)); /* we'll fix this up later */
	109
	110	ewah_start = sb->len;
3bd28eb2 AV	111	ewah_serialize_strbuf(istate->fsmonitor_dirty, sb);
	112	ewah_free(istate->fsmonitor_dirty);
	113	istate->fsmonitor_dirty = NULL;
883e248b BP	114
	115	/* fix up size field */
	116	put_be32(&ewah_size, sb->len - ewah_start);
	117	memcpy(sb->buf + fixup, &ewah_size, sizeof(uint32_t));
	118
	119	trace_printf_key(&trace_fsmonitor, "write fsmonitor extension successful");
	120	}
	121
	122	/*
56c69100	123	* Call the query-fsmonitor hook passing the last update token of the saved results.
883e248b	124	*/
56c69100	125	static int query_fsmonitor(int version, const char last_update, struct strbuf query_result)
883e248b BP	126	{
883e248b BP	127	struct child_process cp = CHILD_PROCESS_INIT;
883e248b	128
735e4173	129	if (!core_fsmonitor)
883e248b BP	130	return -1;
883e248b BP	131
735e4173 RS	132	argv_array_push(&cp.args, core_fsmonitor);
735e4173 RS	133	argv_array_pushf(&cp.args, "%d", version);
56c69100	134	argv_array_pushf(&cp.args, "%s", last_update);
883e248b	135	cp.use_shell = 1;
11cf33be	136	cp.dir = get_git_work_tree();
883e248b BP	137
	138	return capture_command(&cp, query_result, 1024);
	139	}
	140
	141	static void fsmonitor_refresh_callback(struct index_state istate, const char name)
	142	{
	143	int pos = index_name_pos(istate, name, strlen(name));
	144
	145	if (pos >= 0) {
	146	struct cache_entry *ce = istate->cache[pos];
	147	ce->ce_flags &= ~CE_FSMONITOR_VALID;
	148	}
	149
	150	/*
	151	* Mark the untracked cache dirty even if it wasn't found in the index
	152	* as it could be a new untracked file.
	153	*/
	154	trace_printf_key(&trace_fsmonitor, "fsmonitor_refresh_callback '%s'", name);
0cacebf0	155	untracked_cache_invalidate_path(istate, name, 0);
883e248b BP	156	}
	157
	158	void refresh_fsmonitor(struct index_state *istate)
	159	{
883e248b BP	160	struct strbuf query_result = STRBUF_INIT;
	161	int query_success = 0;
	162	size_t bol; /* beginning of line */
	163	uint64_t last_update;
56c69100	164	struct strbuf last_update_token = STRBUF_INIT;
883e248b	165	char *buf;
5d137fc2	166	unsigned int i;
883e248b	167
398a3b08	168	if (!core_fsmonitor \|\| istate->fsmonitor_has_run_once)
883e248b	169	return;
398a3b08	170	istate->fsmonitor_has_run_once = 1;
883e248b BP	171
	172	trace_printf_key(&trace_fsmonitor, "refresh fsmonitor");
	173	/*
	174	* This could be racy so save the date/time now and query_fsmonitor
	175	* should be inclusive to ensure we don't miss potential changes.
	176	*/
	177	last_update = getnanotime();
56c69100	178	strbuf_addf(&last_update_token, "%"PRIu64"", last_update);
883e248b BP	179
	180	/*
	181	* If we have a last update time, call query_fsmonitor for the set of
	182	* changes since that time, else assume everything is possibly dirty
	183	* and check it all.
	184	*/
	185	if (istate->fsmonitor_last_update) {
	186	query_success = !query_fsmonitor(HOOK_INTERFACE_VERSION,
	187	istate->fsmonitor_last_update, &query_result);
	188	trace_performance_since(last_update, "fsmonitor process '%s'", core_fsmonitor);
	189	trace_printf_key(&trace_fsmonitor, "fsmonitor process '%s' returned %s",
	190	core_fsmonitor, query_success ? "success" : "failure");
	191	}
	192
	193	/* a fsmonitor process can return '/' to indicate all entries are invalid */
	194	if (query_success && query_result.buf[0] != '/') {
	195	/* Mark all entries returned by the monitor as dirty */
	196	buf = query_result.buf;
	197	bol = 0;
	198	for (i = 0; i < query_result.len; i++) {
	199	if (buf[i] != '\0')
	200	continue;
	201	fsmonitor_refresh_callback(istate, buf + bol);
	202	bol = i + 1;
	203	}
	204	if (bol < query_result.len)
	205	fsmonitor_refresh_callback(istate, buf + bol);
679f2f9f US	206
	207	/* Now mark the untracked cache for fsmonitor usage */
	208	if (istate->untracked)
	209	istate->untracked->use_fsmonitor = 1;
883e248b	210	} else {
679f2f9f US	211
	212	/* We only want to run the post index changed hook if we've actually changed entries, so keep track
	213	* if we actually changed entries or not */
	214	int is_cache_changed = 0;
883e248b	215	/* Mark all entries invalid */
679f2f9f US	216	for (i = 0; i < istate->cache_nr; i++) {
	217	if (istate->cache[i]->ce_flags & CE_FSMONITOR_VALID) {
	218	is_cache_changed = 1;
	219	istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
	220	}
	221	}
883e248b	222
ca598d5f	223	/* If we're going to check every file, ensure we save the results */
679f2f9f US	224	if (is_cache_changed)
679f2f9f US	225	istate->cache_changed \|= FSMONITOR_CHANGED;
ca598d5f	226
883e248b BP	227	if (istate->untracked)
	228	istate->untracked->use_fsmonitor = 0;
	229	}
	230	strbuf_release(&query_result);
	231
56c69100 KW	232	/* Now that we've updated istate, save the last_update_token */
	233	FREE_AND_NULL(istate->fsmonitor_last_update);
	234	istate->fsmonitor_last_update = strbuf_detach(&last_update_token, NULL);
883e248b BP	235	}
	236
	237	void add_fsmonitor(struct index_state *istate)
	238	{
5d137fc2	239	unsigned int i;
56c69100	240	struct strbuf last_update = STRBUF_INIT;
883e248b BP	241
	242	if (!istate->fsmonitor_last_update) {
	243	trace_printf_key(&trace_fsmonitor, "add fsmonitor");
	244	istate->cache_changed \|= FSMONITOR_CHANGED;
56c69100 KW	245	strbuf_addf(&last_update, "%"PRIu64"", getnanotime());
56c69100 KW	246	istate->fsmonitor_last_update = strbuf_detach(&last_update, NULL);
883e248b BP	247
	248	/* reset the fsmonitor state */
	249	for (i = 0; i < istate->cache_nr; i++)
	250	istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
	251
	252	/* reset the untracked cache */
	253	if (istate->untracked) {
	254	add_untracked_cache(istate);
	255	istate->untracked->use_fsmonitor = 1;
	256	}
	257
	258	/* Update the fsmonitor state */
	259	refresh_fsmonitor(istate);
	260	}
	261	}
	262
	263	void remove_fsmonitor(struct index_state *istate)
	264	{
	265	if (istate->fsmonitor_last_update) {
	266	trace_printf_key(&trace_fsmonitor, "remove fsmonitor");
	267	istate->cache_changed \|= FSMONITOR_CHANGED;
56c69100	268	FREE_AND_NULL(istate->fsmonitor_last_update);
883e248b BP	269	}
	270	}
	271
	272	void tweak_fsmonitor(struct index_state *istate)
	273	{
5d137fc2	274	unsigned int i;
ba1b9cac AV	275	int fsmonitor_enabled = git_config_get_fsmonitor();
	276
	277	if (istate->fsmonitor_dirty) {
	278	if (fsmonitor_enabled) {
	279	/* Mark all entries valid */
	280	for (i = 0; i < istate->cache_nr; i++) {
	281	istate->cache[i]->ce_flags \|= CE_FSMONITOR_VALID;
	282	}
	283
	284	/* Mark all previously saved entries as dirty */
3444ec2e WB	285	if (istate->fsmonitor_dirty->bit_size > istate->cache_nr)
	286	BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
	287	(uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
ba1b9cac AV	288	ewah_each_bit(istate->fsmonitor_dirty, fsmonitor_ewah_callback, istate);
ba1b9cac AV	289
679f2f9f	290	refresh_fsmonitor(istate);
ba1b9cac AV	291	}
	292
	293	ewah_free(istate->fsmonitor_dirty);
	294	istate->fsmonitor_dirty = NULL;
	295	}
	296
	297	switch (fsmonitor_enabled) {
883e248b BP	298	case -1: /* keep: do nothing */
	299	break;
	300	case 0: /* false */
	301	remove_fsmonitor(istate);
	302	break;
	303	case 1: /* true */
	304	add_fsmonitor(istate);
	305	break;
	306	default: /* unknown value: do nothing */
	307	break;
	308	}
	309	}